Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Linear > Audio Amplifiers

STMicroelectronics TS4972EIJT

Name: TS4972EIJT
Brand: STMicroelectronics
SKU: TS4972EIJT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TS4972EIJT

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 8-UFBGA, FCBGA

Datasheet:: TS4972EIJT.pdf

Description:: IC AMP AB MONO 1.6W 8FLIPCHIP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,523

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TS4972EIJT from STMicroelectronics is a 1.2W mono Class AB audio power amplifier in flip-chip package, operating from 2.5V to 5.5V supply, delivering rail-to-rail output with 0.05% THD+N at 1kHz into 8Ω, ultra-low 10nA standby current, and 75dB PSRR at 217Hz - deployed in mobile phone audio output stages driving earpiece or mono speaker.

For engineers reviewing the TS4972EIJT datasheet, TS4972EIJT pinout, TS4972EIJT application, or TS4972EIJT equivalent, this page delivers verified circuit role (mono BTL-capable audio driver), thermal behavior (90°C/W R_thJA with heatsink), gain configuration (externally set via R_in/R_feed), and real-world distortion vs. load/supply data - all confirmed from ST's official October 2004 revision 2 datasheet.

Technical Context

The TS4972EIJT implements a unity-gain stable, internally compensated op-amp core optimized for single-supply audio amplification. Its BTL (bridge-tied load) capability enables 1.2W into 8Ω at 5V without output coupling capacitors, while the dedicated standby pin (active-high) controls shutdown with ~1µs response time.

It features dual-stage biasing for rail-to-rail output swing and incorporates internal thermal shutdown (trip at 150°C) and ESD protection (2kV HBM). The amplifier requires no external compensation across its full 2.5–5.5V supply range and maintains ≥70° phase margin with 500pF capacitive load.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	1.2W RMS @ V_CC=5V, THD=1%, f=1kHz, R_L=8Ω - sufficient for loud mono speaker drive in compact handhelds
THD+N	0.05% typ. @ P_OUT=250mW, G_v=2, 20Hz–20kHz - preserves fidelity in voice and media playback
PSRR	75dB @ 217Hz - rejects GSM burst noise and switching regulator ripple without additional filtering
Standby Current	10nA max. @ V_STB=V_CC - enables multi-week battery life in always-on audio subsystems
Supply Range	2.5V to 5.5V - supports Li-ion (3.0–4.2V), Li-poly, and regulated 3.3V/5V rails
Phase Margin	70° @ unity gain, R_L=8Ω, C_L=500pF - ensures stability with ceramic output caps and long PCB traces
Gain Bandwidth	2MHz - supports flat frequency response up to 125kHz (BW-limited by external C_feed)

Pinout & Package

TS4972EIJT uses a lead-free flip-chip package with eight 300µm solder bumps (no leads), requiring micro-BGA assembly. Thermal performance relies on direct die attachment to PCB copper; recommended heatsink area is 125mm².

Pin/Terminal	Circuit Role	Design Meaning
1, 2	V_OUT1, V_OUT2	Dual outputs configured in BTL mode - deliver differential swing across 8Ω load for doubled voltage and 4× power vs. SE
3	GND	Power and signal reference ground - must be low-impedance plane under chip for THD and PSRR integrity
4	V_IN+	Non-inverting input - accepts AC-coupled audio signal; high-impedance node sensitive to layout-induced noise
5	V_IN−	Inverting input - connected externally to feedback network (R_feed) and gain-setting resistor (R_in)
6	V_CC	Positive supply - bypassed with 100µF Cs; ripple directly impacts PSRR and audible noise floor
7	STDBY	Active-high shutdown control - pulled high to V_CC for standby (10nA I_Q); tied low for normal operation
8	BYPASS	Half-supply bias reference - decoupled with 1µF C_b to stabilize common-mode output level in single-supply BTL

Key Features

Feature	Design Value
Rail-to-rail output	Enables full 0–V_CC swing at both outputs - maximizes headroom and output power from low-voltage supplies
Unity-gain stable	No external compensation required even at 2.6V supply - simplifies design and reduces BOM count across battery voltage range
Ultra-low pop & click	Controlled turn-on/off sequencing minimizes transient thumps during headset insertion or call start/stop
Thermal shutdown	Internal protection activates at 150°C junction temperature - prevents latch-up or permanent damage during sustained high-power operation
Flip-chip construction	Eliminates bond wires and leadframe inductance - improves high-frequency PSRR and reduces package parasitics affecting stability

Applications

Mobile Phone Audio Output

Portable Media Player Speaker Driver

Use Scenario: Driving mono earpiece or bottom-firing speaker in slim smartphone chassis with Li-ion battery (3.0–4.2V).

IC Role / Device Role / Timing Role: Mono BTL audio power stage; replaces discrete transistor pair with integrated bias, protection, and gain control.

Use Value: Delivers 1.2W clean output at 5V with 0.05% THD+N and 75dB PSRR - suppresses 217Hz GSM noise without LC filters.

Use Scenario: Amplifying line-level audio to drive 4Ω or 8Ω mini-speaker in battery-powered MP3 player.

IC Role / Device Role / Timing Role: Final-stage Class AB amplifier with standby control; interfaces directly to DAC output via AC-coupling.

Use Value: 10nA standby current extends 200mAh battery life to >3 weeks in sleep mode; rail-to-rail swing avoids DC-blocking caps.

PDA Audio Subsystem

Laptop Internal Speaker Boost

Use Scenario: Providing audible alert and voice prompt output in space-constrained PDA with shared 3.3V system rail.

IC Role / Device Role / Timing Role: Low-quiescent-current audio driver; enabled only during UI feedback events via GPIO-controlled STDBY pin.

Use Value: Draws only 6mA active current at 3.3V - minimizes impact on main SoC power budget during brief audio bursts.

Use Scenario: Boosting weak DAC output to drive 8Ω laptop speakers without clipping at peak volumes.

IC Role / Device Role / Timing Role: Gain-configurable (G_v=2 or 10) BTL amplifier; bypass capacitor C_b sets virtual ground for single-supply operation.

Use Value: 2MHz GBP and 70° phase margin ensure stable 20Hz–20kHz response with 500pF trace capacitance - no oscillation risk on motherboard.

Equivalent & Alternatives

The following parts are listed as comparable options for similar mono audio amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX9710ETA+	Higher 1.4W output @ 5V/8Ω; 0.02% THD+N; requires external bootstrap cap for BTL; 1.2µA standby (not nA-scale)	Preferred where lower distortion and higher SNR (>100dB) are critical; less suitable for ultra-low-power wake-on-audio designs	Select MAX9710 if PSRR >80dB and THD <0.03% are mandatory; accept larger footprint and higher standby draw.
TFA9894UK/N1	Digital-input Class D (I²S), 1.8W @ 5V/8Ω, 0.01% THD+N, integrated DSP, 15µA standby - but requires clock and digital interface	Used in systems with digital audio path; eliminates analog routing, adds EQ and limiting; incompatible with analog DAC outputs	Choose TFA9894 for new designs with I²S output and need for programmable audio processing; not drop-in for TS4972's analog input topology.

Compared with MAX9710ETA+ and TFA9894UK/N1, TS4972EIJT uniquely balances ultra-low standby (10nA), analog simplicity (no clock/digital interface), and proven BTL stability in space-constrained mobile layouts - making it optimal for cost-sensitive, battery-critical analog audio endpoints.

Availability

TS4972EIJT is available at Aetrix Electronics and suitable for mobile phones, portable media players, PDAs, and laptop speaker boost applications requiring stable component supply and long-term industrial availability.

Supply support for TS4972EIJT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.

The TS4972 belongs to ST's audio power amplifier product line, engineered specifically for low-voltage, low-power, high-fidelity mono audio output in portable electronics - emphasizing standby efficiency, PSRR robustness, and minimal external component count.

FAQ

What is the minimum supply voltage for stable operation of TS4972EIJT?

The TS4972EIJT operates stably down to 2.5V per Absolute Maximum Ratings Table 2 and Electrical Characteristics Tables 3–5. At 2.6V, it delivers 300mW into 8Ω at 1% THD, with 70° phase margin and 2MHz GBP confirmed in Figure 9. Below 2.5V, output swing collapses and thermal derating begins.

How is gain configured, and what resistor values yield G_v=2 in BTL mode?

Gain is set by external R_in and R_feed: G_v(BTL) = 2 × (R_feed/R_in). For G_v=2, use R_feed = R_in (e.g., 22kΩ each). This configuration is validated in Table 6 and Figure 71; no stability issues occur at 2.6–5V with 500pF load per Figure 9.

Does TS4972EIJT require an output coupling capacitor in BTL mode?

No. In BTL configuration, the two outputs swing differentially around V_CC/2 (set by BYPASS pin), eliminating DC offset across the load. The datasheet's Typical Application Schematic shows direct connection to 8Ω speaker without series capacitor - confirmed by rail-to-rail output spec and V_OO ≤20mV.

What thermal management is required for 1.2W continuous operation?

At 1.2W output into 8Ω with 5V supply, power dissipation is ~0.8W (Figure 16). With R_thJA = 90°C/W (Table 3 footnote), junction rise is ~72°C above ambient. A 125mm² copper heatsink (per Figure 20) keeps T_j <125°C at 25°C ambient - mandatory to avoid thermal shutdown activation.

TS4972EIJT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-UFBGA, FCBGA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Class AB

Output Type:: 1-Channel (Mono)

Max Output Power x Channels @ Load:: 1.6W x 1 @ 4Ohm

Voltage - Supply:: 2.5V ~ 5.5V

Features:: Depop, Standby, Thermal Protection

Mounting Type:: Surface Mount

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Supplier Device Package:: 8-FlipChip

TS4972EIJT FAQ

1.How can I place an order for TS4972EIJT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4972EIJT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TS4972EIJT reliable?

The price and inventory of TS4972EIJT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4972EIJT is usually 5 days.

3.What payment methods are accepted for TS4972EIJT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4972EIJT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4972EIJT?

TS4972EIJT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4972EIJT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TS4972EIJT?

For technical support, including TS4972EIJT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4972EIJT requirements.

6.How does Aetrix verify that TS4972EIJT is sourced from the original manufacturer or authorized distributors?

All TS4972EIJT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TS4972EIJT meets industry standards.

7.What is the process for return or replacement of TS4972EIJT?

All TS4972EIJT units undergo pre-shipment inspection (PSI). If there is an issue with TS4972EIJT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TS4972EIJT part is unused and in its original packaging.

Return procedure for TS4972EIJT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…